package com.fieldchain.ex.fa100.utils.common;


import android.content.Context;
import android.os.Environment;

import java.io.File;
import java.math.BigDecimal;

/**
 * Created by Administrator on 2016/1/4.
 */
public class DataCleanManager {
    public static String getTotalCacheSize(Context context) {
        long cacheSize = 0;
        try {
            cacheSize = getFolderSize(context.getCacheDir());
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                cacheSize += getFolderSize(context.getExternalCacheDir());
            }
            return getFormatSize(cacheSize);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return getFormatSize(cacheSize);
    }


    public static void clearAllCache(Context context) {
        deleteDir(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            deleteDir(context.getExternalCacheDir());
        }
    }

    private static boolean deleteDir(File dir) {
        if (dir == null) {
            return false;
        }
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }
        return dir.delete();
    }

    // 获取文件
    //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据
    //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
    public static long getFolderSize(File file) throws Exception {
        long size = 0;
        try {
            File[] fileList = file.listFiles();

            for (int i = 0; i < fileList.length; i++) {
                // 如果下面还有文件
                if (fileList[i].isDirectory()) {
                    size = size + getFolderSize(fileList[i]);
                } else {
                    size = size + fileList[i].length();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }

    /**
     * 格式化单位
     * android 获取文件夹、文件的大小 以B、KB、MB、GB 为单位
     *
     * @param size
     * @return
     */
    public static String getFormatSize(double size) {
        double num = 0;
        String company = "";
        double kb = size / 1024;

        if (kb < 1) {
            num = size;
            company = "B";
        } else if (kb < 1024) {
            num = kb;
            company = "KB";
        } else if (kb < 1048576) {
            num = kb / 1024;
            company = "MB";
        } else if (kb < 1073741824) {
            num = kb / 1048576;
            company = "GB";
        }
        BigDecimal bg = new BigDecimal(num);
        num = bg.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
        String result = num + company;
        return num + company;
    }


}
